option to exclude users/groups from password expiration policy

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Is your feature request related to a problem? Please describe.
Some people want password expiration for their regular users, but also have a "system" user account that is used for scripting, API calls, windmill automation/workflows -> this user account should not get its password expired.

Describe the solution you'd like
Option to exclude groups from password expiration policy (maybe also users, but groups would be more important, you could create groups with just one user)

Describe alternatives you've considered

Additional context
loosely related, but it is about sharing policies, not about password policies: https://github.com/nextcloud/server/issues/47133

The issue names no files, tests, or entry points. Start by locating the password expiration policy implementation in the password_policy repository and determine how user and group exclusions should be represented. Done means the requested exclusion behavior is defined and covered for the stated scripting or system-account use case.